When I say I get it to work, all I have been able to do is install the wrap connector and get the adapter to talk to itself as verified with putty. This would also explain why sometimes it will work after installing into a different USB connector on the PC since those timings can vary as well. Consequently if a chip designer is not careful about meeting USB timing specs then there will be situations when that chip will not work. From my work experience I know that the USB timings are very critical in order to maximize performance. However, if I use an extension USB cable most of the time it fails to work. I say this because I have noticed that if I plug my Ch340 board directly into my USB port it works. Next, it is apparent that the Ch340 design does not meet USB standards in the area of critical timings. After doing that I was able to solve the install failed problem. First thing to do is run/click the uninstall button. Since my last posting I have discovered some things that may help eliminate this problem.
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